Southern California senior quarterback Mo Hasan said Monday that he sustained a major knee injury during Saturday’s spring game.Hasan said he will undergo surgery to repair the knee.”Bringing this same energy going into rehab,” Hasan said on Twitter. “I’ll be undergoing surgery for a torn ACL suffered during the spring game. Please don’t feel sorry, I’m going to crush this process and be back stronger! Appreciate the love everybody.”Hasan didn’t see any action in 2020 behind star quarterback Kedon Slovis. He was competing for the backup job in spring drills.